Mining-machine.



PATENTED Nov. 28, 1905.

W. H. SEXTON. MINING MACHINE.

APPLIQATION FILBDJULYS, 1905.

2 SHEETS-SHEET 1.

mmm/EVS N5. 805,885. PATIINTND Nov.za,19o5.

W. II. sNXToN. l MINING MACHINE.

APPLICATION FILED JULY 6, 1905.

INVENTUI'? 1 IINITD srATns PA'IIIINT OFFIOE.

WILLIAM HOWARD sEXTON, OF SULLIVAN, INDIANA.

MINING-MACHINE. I

Specification of Letters Patent.

Patented Nov. 2s, 1905.

Application nea July 6, 1905. seal No. 268,362.

Referring to the drawings forming a part hereof, Figure 1 isa plan viewof my improved machine. Fig. 2 is acentral longitudinal section of thesame. Fig. 3 is a plan view of the motor end of the machine with themotor and platform removed. Fig. 4 is atop plan and front view,respectively, ofthe cross-bar. Fig. 5 is an end view of thecutting-chain-carrying frame with -the cutter-chain removed, and Fig. 6is a section' on the line 6 6 of Fig.'1.

In the practical application of my invention I provide a bed-framecomposed of flat side bars A, arranged with their widest dimensions f ina verticalplane and provided with'channels a in their inner faces.Suitablecross-Joars B, having recesses for receiving the side bars, areprovided for securing the side bars together, and upon the lower facesof the crosspieces are arranged shoes C for convenience in sliding theframe over the ground. A earriage D is arranged to slide upon thebedframe and comprises in the present instance across-plate or platformE, sliding in the channels A, a longitudinal bar, and a front cross-'barG. The platform E supports the motor E and the wheel e' for driving thecutter-chain K. Channel-bars I extend from the platform to the Outerends of the bar G and form therewith 'a substantially triangular frame,having journaled within the outer corners thereof the guide-wheels g g'.A cutterchain K, supported on the driving-wheel e' and the guide-wheelsg g', is provided with cutters le, secured to the links thereof, and issupported between the guide-wheels g g by shaft, and nuts Z engage theends of the bolts,

securing the plates and the shafts rigidly together. The rollers L arejournaled on 'the shafts and are approximately one inch in thickness,andthe back of the cutter-chain rests upon the rollers, thus beingsupported firmly in contact with the face of the coal. For conveniencein oiling the rollers an opening Z3 is provided longitudinally of theshaft lf, and radial openings Zdi lead from the longitudinal opening tothe outer face of the shaft.

The shaft ofthe motor E' is provided with a pinion e, meshing with thepinion e2 on the counter-shaft .ei-and a bevel-gear securedto the outerend of the said shaft meshes wlth the bevel-gear e* on a verticalstud-shaft e5,

-journaled in a bearing e6 in theplatform E, and

on the lower end of the stud-shaft is journaled the driving-wheel eofthe cutter-chain. A worm e7 on the counter-shaft e3 operates aworm-wheel on a short. horizontal shaft e, journaled in bearings el on'a platform E, the

rear end of the shaft being provided with a worm e, meshing with theworm-wheel @12, loosely mounted on a transverse shaft @13 on the rear.ofthe platform E. A bevel-gear e is secured to the inner face of thepinion e2 on the counter-shaft e3 and meshes with the bevel-gear @15 Ona second horizontal shaft el, parallel to the shaft e and provided witha Worm @17, meshing with a second Worm-wheel els, loosely. mounted onthe transverse shaft @13. A sleeve el, provided with oppositelydisposedclutching-faces 62 for coacting with clutchingfaces 621 622 on thewormwheels @12 els, is splined to the shaft @13, and a lever 623 isprovided for manipulating the sleeve. The ends of the shaft@13 areprovlded with pinions ex, engaging the rack-bars. 12X, securedv riageforward or backward in accordance with the direction of rotation of theshaft.

In operation, the machine being placed in proper p'osition with respectto the face of the coal, the motor is started, the clutches being inproper position to drive the carriage forward by means of the engagementof the gears and pinions. When the cut has been made to a sufficientdepth, the machine is reversed by means of the clutches and the slidingframe is withdrawn and the machine is moved far enough to the side sothat it will be in posi- 4tion for a second cutting.

By providing the active portion ofthe chain- IOO am fJ cutter with theroller-support friction is reduced to a considerable eXtent, while atthe same time the rollers afford a drm support for the back of thecutter.

It will be evident from the description that the provision of the shaftsof large diameter engaging the counterbored openings in the platesprovide an eflicient means for securing' the plates in spaced relationwith respect to the rollers, thus reducing` the friction between tlieends oi' the rollers and the plates to a minimum.

Having thus described my invention, what I claim as new, and desire tosecure b v Letters Patent, is-

In a mining-machine the combination of the bed-frame, a carriageslidably mounted in the frame and comprising side bars connected at thefront by a cross-bar comprising upper and lower plates, guide-wheelsjournaled between tlie ends of the plates, a drive-Wheel journalcd atthe rear of the carriage, a cutter-chain supported on the drive-wheel,and the guidewlieels, and means for supporting the cutterchain betweenthe guide-wheels comprising shafts of relatively large diameter engagingcounterbored openings in the plates and provided with a longitudinalopening and with radial openings communicating therewith` boltstraversing tlie shafts and the plates, nuts engaging the boltsforsecuring the shafts and plates together and rollers on the shafts.

WILLIAM HOVARD SEXTON.

itnessesz W. B. EDMoNDs, CHARLES D. HUNT.

